WO2019096244A1

WO2019096244A1 - Method and apparatus for sending sounding reference signal (srs)

Info

Publication number: WO2019096244A1
Application number: PCT/CN2018/115883
Authority: WO
Inventors: 秦熠; 窦圣跃; 高翔; 刘建琴; 张闽
Original assignee: 华为技术有限公司
Priority date: 2017-11-17
Filing date: 2018-11-16
Publication date: 2019-05-23
Also published as: EP3713335A4; US20200280404A1; EP4311176A2; BR112020009723A2; CN113660188A; US11824699B2; US20220209908A1; EP3713335A1; EP3713335B9; CN109802810B; CN109802810A; US11233609B2; EP4311176A3; EP3713335B1

Abstract

The present application provides a method for sending a sounding reference signal (SRS), which can support various frequency hopping modes, thereby improving the flexibility of frequency hopping. The method comprises: a terminal device receiving, from a network device, first configuration information of an SRS resource, the first configuration information comprising a repetition factor of the SRS resource, the repetition factor of the SRS resource referring to the SRS resource being mapped to the same sub-carrier within a time unit and the number N of the SRS resource being mapped to at least one consecutive symbol, N ≥ 1, N being an integer; the terminal device determining, according to the first configuration information, at least one first frequency domain resource mapped by the SRS resource within a first time unit; and the terminal device sending the SRS to the network device on the at least one first frequency domain resource.

Description

Method and apparatus for transmitting sounding reference signal SRS

This application claims the priority of the Chinese Patent Application, filed on November 17, 2017, to the Chinese Patent Office, Application No. 201711149046.X, entitled "Method and Apparatus for Sending Sounding Reference Signal SRS", the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of communications, and in particular, to a method and apparatus for transmitting a sounding reference signal SRS.

Background technique

In a long term evolution (LTE) or an evolved LTE (LTE-advanced, LTE-A) system, uplink measurement of a terminal device is implemented by transmitting a sounding reference signal (SRS). The network device obtains uplink channel state information by measuring the SRS sent by the terminal device. Further, in the LTE or LTE-A system, since the distance of the terminal device from the network device (for example, the base station) is different, the remote terminal device may be limited in power. In order to ensure that the base station receives enough SRS, the terminal equipment must ensure narrowband when transmitting the SRS. At this time, in order to measure the SRS of the total bandwidth of the system, the measurement of the total bandwidth of the system can only be completed by frequency hopping.

However, in the LTE or LTE-A system, the frequency hopping is performed based on the bandwidth of the cell-level configuration, that is, the hopping mode of the terminal device is determined according to the total bandwidth of the SRS measurement configured by the cell, and only the hop between the slots is supported. frequency. In addition, for the measurement of aperiodic SRS, LTE is also not supported.

It can be seen that the existing communication system has insufficient support for the frequency hopping mode and has poor flexibility.

Summary of the invention

The present application provides a method for transmitting a reference signal, which can support multiple frequency hopping modes, thereby improving the flexibility of frequency hopping.

In a first aspect, the present application provides a method for transmitting a sounding reference signal SRS, the method comprising: receiving, by a terminal device, first configuration information of an SRS resource from a network device, where the first configuration information includes a repetition factor of the SRS resource, where the SRS resource The repetition factor is that the SRS resource is mapped to the same subcarrier in one time unit and is mapped to the number of consecutive at least one symbol N, N ≥ 1 and is an integer; the terminal device determines, according to the first configuration information, that the SRS resource is At least one first frequency domain resource mapped in the first time unit; the terminal device sends the SRS to the network device in the at least one first frequency domain resource.

With reference to the first aspect, in some implementations of the first aspect, the terminal device determines, according to the first configuration information, the at least one first frequency domain resource that the SRS resource maps in the first time unit, including: the terminal device according to the first Determining, by the configuration information and the second configuration information, the at least one second frequency domain resource of the SRS resource in the first time unit, where the second frequency domain resource is part of the first frequency domain resource; and the terminal device is in the Transmitting the SRS to the network device by using the at least one first frequency domain resource, where the terminal device sends the SRS to the network device in the at least one second frequency domain resource.

With reference to the first aspect, in some implementations of the first aspect, the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter, where the SRS bandwidth parameter is used to determine that the second frequency domain location is occupied by The bandwidth, the SRS bandwidth location parameter is used to determine a location of a bandwidth corresponding to the second frequency domain resource in a bandwidth corresponding to the first frequency domain resource.

In conjunction with the first aspect, in some implementations of the first aspect, the bandwidth corresponding to the second frequency domain resource is one of the SRS bandwidth sets configured by the user level configuration parameter C _SRS .

With reference to the first aspect, in some implementations of the first aspect, the first configuration information further includes the number of symbols that the SRS resource can occupy in one time unit.

A positive integer, and the terminal device determines, according to the first configuration information, the at least one first frequency domain resource that is mapped by the SRS resource in the first time unit, where the terminal device determines the SRS according to the first configuration information and the third configuration information. At least one third frequency domain resource mapped by the resource in the first time unit, the at least one third frequency domain resource being a set of the at least one first frequency domain resource in the one or more of the time units And transmitting, by the terminal device, the SRS to the network device in the at least one first frequency domain resource, where the terminal device sends the SRS to the network device in the at least one third frequency domain location.

In conjunction with the first aspect, in some implementations of the first aspect, the third configuration information is used to indicate the number of reference symbols

The number of reference symbols is used to determine at least one first frequency domain resource occupied by the SRS resource in the first time unit, where

Greater than the above

Is a positive integer.

With reference to the first aspect, in some implementations of the first aspect, the third configuration information is used to configure at least one fourth frequency domain resource, where a bandwidth of the fourth frequency domain resource is greater than the first frequency domain resource Bandwidth, and only one of the first frequency domain resources is included in the fourth frequency domain resource.

With reference to the first aspect, in some implementations of the first aspect, the SRS resource is an aperiodic SRS resource, the total bandwidth to be measured is composed of K non-overlapping SRS bandwidths, and the terminal device is at the at least one first a frequency domain resource, sending an SRS to the network device, including:

Less than K·N, the terminal device transmits the SRS on each of the at least one first frequency domain resource, and does not send the SRS on a time unit other than the first time unit; or If stated

More than the K·N, the terminal device transmits the SRS on the first K·N symbols of the SRS resource.

With reference to the first aspect, in some implementations of the first aspect, the first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured The frequency interval between the two is not greater than the first threshold, and/or the frequency interval between the second frequency domain location of the at least one first frequency domain resource and the second frequency domain location of the total bandwidth to be measured Not greater than a second threshold value, the first threshold value being determined according to at least one of the following parameters:

The N, the total bandwidth to be measured and the user-level SRS bandwidth, and/or the second threshold are determined according to at least one of the following parameters: the K, the

The N, the total bandwidth to be measured, and the user-level SRS bandwidth.

The first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource may be the frequency domain location of the lowest or highest frequency or the center subcarrier of the bandwidth occupied by the at least one first frequency domain resource. Or, it may be other frequency domain locations adjacent to the frequency domain location of the lowest or highest or center subcarrier of the frequency. The second frequency domain location of the bandwidth occupied by the at least one first frequency domain resource may be the frequency domain location of the highest or lowest or the center frequency subcarrier of the bandwidth occupied by the at least one first frequency domain resource, or It may also be other frequency domain locations that are adjacent to the frequency domain location of the highest or lowest or center subcarrier of the frequency.

Similarly, the first frequency domain location of the total bandwidth to be measured may be the frequency domain location of the lowest or highest frequency or the center of the total bandwidth to be measured, or may be the lowest or highest or center of the frequency. The subcarriers are located in other frequency domain locations adjacent to the frequency domain location. The second frequency domain location of the total bandwidth to be measured may be the frequency domain location of the highest or lowest frequency or the center of the total bandwidth to be measured, or may be the highest or lowest or center of the frequency. The other frequency domain locations in the frequency domain where the carrier is located.

With reference to the first aspect, in some implementations of the first aspect, a frequency interval between third frequency domain locations of two adjacent first frequency domain resources in the at least one first frequency domain resource is not greater than a three threshold value, wherein the third threshold value is determined according to at least one of the following parameters:

The N, the total bandwidth to be measured, and the user-level SRS bandwidth.

In this embodiment of the present application, the third frequency domain location may be any one of the frequency domain locations occupied by the first frequency domain resource. For example, the frequency domain location where the lowest frequency subcarrier is located, the frequency domain location where the highest frequency subcarrier is located, the frequency domain location where the subcarrier of the center frequency is located, or the frequency domain location where any subcarrier is located. Taking the frequency domain location where the subcarriers of the lowest frequency are located as an example, that is, the frequency interval between the frequency domain locations where the subcarriers of the lowest frequency of the adjacent two first frequency domain resources are located is not greater than the third threshold.

With reference to the first aspect, in some implementations of the first aspect, the start symbol of the SRS resource in one time unit, and the number of symbols occupied by the SRS resource in one time unit

The repetition factor with the SRS resource is jointly encoded.

With reference to the first aspect, in some implementations of the first aspect, the SRS resource is a non-periodic SRS resource, and the method further includes: if K is not equal

The terminal device does not send the SRS on the SRS resource in the first time unit; or, if K is greater than

The terminal device does not send the SRS on the SRS resource in the first time unit; or, if K is smaller than

Then, the terminal device does not send the SRS on the SRS resource in the first time unit.

In conjunction with the first aspect, in some implementations of the first aspect, the value of the repetition factor of the SRS resource includes 1, 2, and 4.

In conjunction with the first aspect, in some implementations of the first aspect, the first time unit is a time slot, a subframe, a mini-slot, or a transmission time interval TTI.

In a second aspect, the present application provides a method for receiving a sounding reference signal SRS, the method comprising: the network device transmitting first configuration information of the SRS resource to the terminal device, where the first configuration information includes a repetition factor of the SRS resource, where the SRS resource The repetition factor is that the SRS resource is mapped to the same subcarrier in one time unit and is mapped to the number of consecutive at least one symbol N, N ≥ 1 and is an integer; the network device receiving terminal device is in at least one first frequency domain The SRS sent by the resource, where the at least one first frequency domain resource is a frequency domain resource of the transmitted SRS determined by the terminal device according to the first configuration information.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sending the second configuration information to the terminal device, so that the terminal device determines, according to the first configuration information and the second configuration information, the at least one a second frequency domain resource, the second frequency domain resource is a part of the bandwidth of the first frequency domain resource; and the network device receives the SRS sent by the terminal device in the at least one first frequency domain resource, where the network device receives the terminal device in the The SRS transmitted by at least one second frequency domain resource.

With reference to the second aspect, in some implementations of the second aspect, the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter, where the SRS bandwidth parameter is used to determine a bandwidth occupied by the second frequency domain resource, and the SRS bandwidth The location parameter is used to determine a location of a bandwidth corresponding to the second frequency domain resource in a bandwidth corresponding to the first frequency domain resource.

With reference to the second aspect, in some implementation manners of the second aspect, the bandwidth corresponding to the second frequency domain resource is one of the SRS bandwidth sets configured by the user level configuration parameter C _SRS .

With reference to the second aspect, in some implementations of the second aspect, the first configuration information further includes the number of symbols that the SRS resource can occupy in one time unit.

a positive integer, and the method further includes: the network device sending the third configuration information to the terminal device, so that the terminal device determines the at least one third frequency domain resource according to the first configuration information and the third configuration information, where the at least one The tri-frequency domain resource is a subset of the set of the at least one first frequency domain resource in one or more of the time units; and the network device receives the SRS sent by the terminal device in the at least one first frequency domain resource, The method includes: the network device receiving the SRS sent by the terminal device in the at least one third frequency domain resource.

In conjunction with the second aspect, in some implementations of the second aspect, the third configuration information is used to indicate the number of reference symbols

Greater than the above

And said

Is a positive integer.

With reference to the second aspect, in some implementations of the second aspect, the third configuration information is used to configure the at least one fourth frequency domain resource, the bandwidth of the fourth frequency domain resource is greater than the bandwidth of the first frequency domain resource, and the fourth The frequency domain resource contains only one first frequency domain resource.

With reference to the second aspect, in some implementations of the second aspect, the SRS resource is an aperiodic SRS resource, and the total bandwidth to be measured corresponds to K non-overlapping frequency resources, and the bandwidth of the frequency resource is SRS bandwidth, and Receiving, by the network device, the SRS sent by the terminal device in the at least one first frequency domain resource, including:

Less than K·N, the terminal device sends the SRS on each of the at least one first frequency domain resource, and does not send the SRS on a time unit other than the first time unit Or, if

Above K·N, the terminal device transmits the SRS on the first K·N symbols of the SRS resource.

With reference to the second aspect, in some implementations of the second aspect, a frequency interval between a lowest first frequency domain resource of the at least one first frequency domain resource and a lowest frequency of the total bandwidth to be measured is not greater than a threshold value, and/or a frequency interval between a highest frequency domain position of the at least one first frequency domain resource and a highest frequency of the total bandwidth to be measured is not greater than a second threshold, the first threshold The value and the second threshold are determined according to at least one of the following parameters: K,

N, total bandwidth to be measured and user-level SRS bandwidth.

With reference to the second aspect, in some implementations of the second aspect, the frequency interval between two adjacent first frequency domain resources in the at least one first frequency domain resource is not greater than a third threshold, where The third threshold is determined according to at least one of the following parameters: K,

N, total bandwidth to be measured and user-level SRS bandwidth.

With reference to the second aspect, in some implementations of the second aspect, the start symbol of the SRS resource in one time unit, and the number of symbols occupied by the SRS resource in one time unit

Coordinated with the repetition factor of the SRS resource.

With reference to the second aspect, in some implementations of the second aspect, the SRS resource is an aperiodic SRS resource, and the method further includes: if K is not equal

The network device does not receive the SRS in the first time unit; or, if K is greater than

The network device does not receive the SRS in the first time unit; or, if K is less than

The network device does not receive the SRS in the first time unit.

In conjunction with the second aspect, in some implementations of the second aspect, the value of the repetition factor of the SRS resource includes 1, 2, and 4.

In conjunction with the second aspect, in some implementations of the second aspect, the first time unit is a time slot, a subframe, a mini-slot, or a transmission time interval TTI.

In a third aspect, the present application provides a terminal device having a function of implementing a terminal device in a method design of the above first aspect. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a fourth aspect, the application provides a network device having the function of implementing the network device in the method design of the foregoing second aspect. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a fifth aspect, the application provides a terminal device, where the terminal device includes a transceiver, a processor, and a memory. The processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from the memory such that the terminal device performs the method of the first aspect above.

In a sixth aspect, the application provides a network device including a transceiver, a processor, and a memory. The processor is for controlling transceiver transceiver signals for storing a computer program for calling and running the computer program from memory such that the network device performs the method of the second aspect.

In a seventh aspect, the present application provides a communication device, which may be a terminal device in the above method design, or a chip disposed in the terminal device. The communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface. The program code stored in the memory includes instructions which, when executed by the processor, cause the communication device to perform the method performed by the terminal device in any of the possible aspects of the first aspect or the second aspect described above.

In an eighth aspect, the present application provides a communication device, where the communication device includes: the network device in the above method design, or a chip disposed in the network device. The communication device includes a memory for storing computer executable program code, a communication interface, and a processor coupled to the memory and the communication interface. The program code stored in the memory includes instructions that, when executed by the processor, cause the communication device to perform the method performed by the network device in any of the possible aspects of the first aspect or the second aspect described above.

In a ninth aspect, the application provides a computer program product comprising: computer program code, causing a computer to perform the method of the above aspects when the computer program code is run on a computer.

According to a tenth aspect, a computer readable medium storing program code for causing a computer to perform the method of the above aspects when the computer program code is run on a computer.

In an eleventh aspect, the present application provides a chip system including a processor for a terminal device to implement the functions involved in the above aspects, such as, for example, receiving or processing data and/or processing in the above method. information. In a possible design, the chip system further comprises a memory for storing necessary program instructions and data of the terminal device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a twelfth aspect, the present application provides a chip system including a processor for supporting a network device to implement the functions involved in the above aspects, such as, for example, transmitting or processing data and/or data involved in the above method. Or information. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the network device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In the embodiment of the present application, the network device can support multiple frequency hopping modes by configuring a repetition factor of the SRS resource. For example, the network device can support frequency hopping between time slots, time slots, and frequency hopping on each symbol in the time slot. Frequency hopping, periodic or semi-persistent SRS resources and non-periodic SRS frequency hopping between time slots and time slots can improve the flexibility of frequency hopping.

DRAWINGS

FIG. 1 is a wireless communication system 100 suitable for use in an embodiment of the present application.

FIG. 2 is a schematic interaction diagram of a transmission reference signal according to an embodiment of the present application.

3 is a schematic diagram of a repetition factor of SRS resources.

FIG. 4 is a schematic diagram of the terminal device pushing and transmitting the SRS.

FIG. 5 is a schematic diagram of determining a second frequency domain resource in an embodiment of the present application.

FIG. 6 is a schematic diagram of determining a third frequency domain resource in an embodiment of the present application.

FIG. 7 is a schematic diagram of a terminal device transmitting an SRS.

FIG. 8 is another schematic diagram of a terminal device transmitting an SRS.

FIG. 9 is a frequency hopping pattern in a configuration using an embodiment of the present application.

FIG. 10 is a frequency hopping pattern in another configuration using an embodiment of the present application.

Figure 11 is a frequency hopping pattern in a configuration.

Figure 12 is a frequency hopping pattern in another configuration.

FIG. 13 is a frequency hopping pattern in a configuration using an embodiment of the present application.

FIG. 14 is a frequency hopping pattern in another configuration using an embodiment of the present application.

FIG. 15 is a frequency hopping pattern in a configuration using an embodiment of the present application.

FIG. 16 is a frequency hopping pattern in another configuration using an embodiment of the present application.

FIG. 17 is a schematic block diagram of a terminal device 500 according to an embodiment of the present application.

FIG. 18 is a schematic block diagram of a network device 600 according to an embodiment of the present application.

FIG. 19 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application.

FIG. 20 is a schematic structural diagram of a network device 800 according to an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a wireless communication system 100 suitable for use in an embodiment of the present application. At least one network device 101 may be included in communication system 100 in communication with one or more terminal devices (e.g., terminal device 102 and terminal device 103 shown in FIG. 1). The network device 101 may be a base station, or may be a device integrated with a base station controller, or may be another device having similar communication functions.

The wireless communication system mentioned in the embodiments of the present application includes, but is not limited to, a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code division multiple access (wideband). Code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, advanced long term evolution (LTE-A) system, LTE frequency division duplex ( Frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, Next-generation communication systems (for example, fifth-generation (5G) communication systems), converged systems for multiple access systems, or evolutionary systems, three major application scenarios for next-generation 5G mobile communication systems, eMBB, URLLC and eMTC Or a new communication system that will emerge in the future.

The network device 101 involved in the embodiment of the present application may be any device having a wireless transceiver function or a chip that can be disposed on the device, and the device includes but is not limited to: a base station (for example, a base station NodeB, an evolved base station eNodeB, Network equipment in a five-generation (5G) communication system (for example, a transmission point (TP), a transmission reception point (TRP), a base station, a small base station device, etc.), a network device in a future communication system, An access node, a wireless relay node, a wireless backhaul node, etc. in a wireless-fidelity (WiFi) system.

The terminal device (for example, the terminal device 102 in FIG. 1) involved in the embodiment of the present application may include various access terminals, user units, user stations, mobile stations, mobile stations, remote stations, and remote terminals having wireless communication functions. A terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. For example, it can be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, industrial control (industrial control) Wireless terminal, machine type communication (MTC) terminal, customer premise equipment (CPE), wireless terminal in self driving, wireless in remote medical A terminal, a wireless terminal in a smart grid, a wireless terminal in a transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. The embodiment of the present application does not limit the application scenario. In the present application, the foregoing terminal device and a chip that can be disposed in the foregoing terminal device are collectively referred to as a terminal device.

In order to facilitate understanding of the solution, some concepts involved in the embodiments of the present application are briefly introduced.

The SRS resource refers to a resource configured by the network device for the terminal device to send the sounding reference signal SRS. In the embodiment of the present application, the terminal device uses one time unit as a unit for transmitting the SRS to the network device. The network device configures the SRS resource for the terminal device, including the configuration of the frequency domain resource, the time domain resource, and the code domain resource. The embodiments of the present application mainly relate to the configuration of time domain resources and frequency domain resources. Optionally, the SRS resource can be understood as a configuration of a set of SRS resources.

The time unit mentioned in the embodiment of the present application may be a subframe, a time slot, a mini time slot, a transmission time interval (TTI), and the first time unit is an example of a time unit. Alternatively, the first time unit can also be understood as the time unit that currently needs to transmit the SRS.

Total bandwidth to be measured: indicates the frequency hopping range, which is one of the bandwidth sets configured by the user-level configuration parameter C _SRS . In this application, it is recorded as b _hop .

In addition, the “total bandwidth to be measured includes K non-overlapping frequency resources” and “total hop count K” described in the embodiments of the present application, and actually describes the total bandwidth to be measured from different angles. In other words, after hopping of K hops, the total bandwidth to be measured can be covered, and each hop corresponds to the bandwidth occupied by one of the K non-overlapping frequency resources. Moreover, the bandwidth occupied by each of the K non-overlapping frequency resources is one SRS bandwidth.

User-level configuration parameter C _SRS : used to configure a bandwidth set, and the bandwidth set includes multiple SRS bandwidths.

User Level Configuration Bandwidth B _SRS : is one SRS bandwidth in the bandwidth set of the C _SRS configuration.

SRS bandwidth refers to the bandwidth used to transmit SRS on one symbol.

The meaning of these parameters can also be found in the relevant description in LTE. It should be noted that in LTE, C _SRS is a cell level configuration parameter, and in NR, C _SRS is a user level configuration parameter.

In addition, a simple distinction is made between the two concepts that are easily confused in the embodiments of the present application. One is the number of symbols that the SRS resource can occupy in one time.

One is how many symbols the terminal device sends SRS to the network device in one time unit. The former can be considered as the configuration of the network device. The terminal device can send the SRS by using the configuration of the network device, and the number of symbols used by the terminal device when sending the SRS is

equal. Alternatively, the terminal device may also send the SRS by using only part of the resources of the SRS resource configured by the network device (for example, part of the frequency domain resource or part of the time domain resource). At this time, the number of symbols used by the terminal device when transmitting the SRS is

Not equal, for example, may be less than

In addition, the numbers “first”, “second”, and the like appearing in the embodiments of the present application are only used to distinguish different description objects, for example, to distinguish different frequency domain resources (for example, the first frequency domain resource, the second frequency The domain resource), the threshold value (for example, the first threshold value, the second threshold value, and the third threshold value) or the configuration information, etc., should not be limited to the technical solutions of the embodiments of the present application.

Referring to FIG. 2, FIG. 2 is a schematic interaction diagram of a transmission reference signal according to an embodiment of the present application.

The technical solution of the embodiment of the present application is described by using a sounding reference signal (SRS) as an example. The technical solution of the present application can also be used for other reference signal transmission scenarios of channel measurement.

210. The network device sends first configuration information of the SRS resource to the terminal device. The terminal device receives the first configuration information of the SRS resource from the network device.

The first configuration information of the SRS resource is used to indicate a time domain parameter configured by the network device for the SRS resource. Specifically, these time domain parameters include time domain parameters at the time slot level and time domain parameters at the symbol level.

For periodic or semi-persistent SRS resources, the time domain parameters at the slot level include the period and time domain offset of the SRS resources.

For aperiodic SRS resources, the time domain parameters of the slot level include the time domain offset of the SRS resource, or the minimum value of the time domain offset.

Considering that different subcarrier spacing and a larger carrier frequency range are supported in the NR. In addition, the channel change speed is different at different carrier frequencies. For example, the channel changes rapidly at high frequencies and the channel changes slowly at low frequencies. In addition, the slot lengths are different for different subcarrier spacings. Therefore, the absolute time length corresponding to the same slot level period is also different. For example, the time length of one slot of 15 KHz may be 4 times the length of one slot of 60 KHz.

In order to balance the measurement requirements of the terminal equipment for the carrier frequency and the sub-carrier spacing, the following three configuration schemes are proposed in the embodiment of the present application (hereinafter referred to as scheme A, scheme B, and scheme C, respectively).

Option A

Support for larger cycle configurable ranges.

In scheme A, the network device can configure the slot level parameters of the SRS resource according to Table 1. Compared with the periodic configuration in which only 2 to 320 ms is supported in LTE, the configuration of 640 slots and 1280 slots is added, and the network device can configure a larger slot-level period for a larger sub-carrier spacing.

Table 1

Alternatively, the case where the period is 2 may not be included, see Table 2.

Table 2

Alternatively, some periods contain multiple time offsets, see Table 3, and the vacant portion of Table 3 is not limited.

table 3

Option B

Different subcarrier spacings correspond to different configuration tables, or a set of subcarrier spacings corresponds to a set of configuration tables.

For example, 15 KHz corresponds to a period of 2 to 320 slots, and 60 KHz corresponds to a period of 10 to 1280 slots. See Table 4 and Table 5.

Table 4

table 5

Alternatively, the case where the period is 2 may not be included. Or contain multiple offsets in one cycle.

Option C

Different carrier frequencies correspond to different configuration tables. For example, Tables 4 and 5 in Scheme B are for 6 GHz or less and 6 GHz or higher, respectively. Alternatively, different carrier frequencies correspond to different period units. For example, the tables of scenario A and scenario B use time slots as the unit of the cycle. In the scheme C, the unit of the period below 6 GHz is k = 2 ^μ slots. The period above the 6 GHz carrier frequency is a time slot k=2 ^μ-2 . Where μ is the index of the subcarrier spacing. See Table 6.

Table 6

Alternatively, it may not include a case where the period is 2, or a case where a plurality of offsets are included in one cycle.

In addition, for aperiodic SRS resources, the network device may configure or pre-define the minimum time interval or time interval of the PDCCH carrying the DCI or the Control Resource Set (CORESET) and the SRS resources.

For convenience of explanation, we denote the time slot in which the PDCCH or CORESET carrying the DCI is recorded as the time slot m, and the time slot in which the SRS resource is located as the time slot n, where m ≤ n, m and n are positive integers.

Specifically, the unit of the period may be an optional case as listed below.

(1) The slot level interval of slot m and slot n.

(2) The symbol level interval between the symbol of the PDCCH or CORESET carrying the DCI and the first or last symbol of the SRS resource in slot n.

For case (2), optionally, there is no need to configure the start symbol of the SRS resource.

Optionally, the optional value of the symbol level interval has a certain range, and the SRS resource mapping is guaranteed to be on the symbol that can send the SRS. For example, the last 6 symbols of slot n.

(3) The time interval is configured by the network device, and the time interval has a minimum value, which can be predefined. For example, the minimum value can be predefined as 4 time slots. Alternatively, the terminal device may report the minimum value to the network device according to its own measurement capability. Optionally, the network device may select one time interval to allocate to the terminal device among some candidate values.

(4) The terminal device may report at least one of the following: a time interval, a minimum value of the time interval, and a candidate value of the time interval.

(5) The network device configures the time interval for the SRS resource.

Optionally, the network device configures a time interval for the SRS resource set where the SRS resource is located. When a terminal device sends an SRS resource in an SRS resource set, the time interval of the SRS resource set is adopted. Optionally, the network device may not need to configure time interval information of each SRS resource in the SRS resource. Alternatively, the terminal device jointly determines the time interval between the DCI and the SRS resource transmission according to the time interval of the SRS resource set and the time interval of the SRS resource (for example, the two are added). The time interval of the SRS resource set and/or the SRS resource may be determined according to the identifier of the SRS resource set or the identifier of the SRS resource. For example, the time interval is equal to the sum of the identity value or the identity value and an offset value.

The terminal device determines the time domain resource of the SRS resource according to the symbol or time slot in which the PDCCH or CORESET carrying the DCI is located, and the time interval. For example, the terminal device determines that m is the sum of n and the time domain interval. For another example, the terminal device determines the time domain resource of the SRS resource according to the sum of the symbol of the PDCCH or CORESET carrying the DCI and the time domain interval.

Optionally, the DCI may be used to trigger at least one SRS resource, and may also be used to trigger at least one SRS resource set. When used to trigger an SRS resource set, the DCI includes an identifier for indicating SRS resource set identification information or for indicating an SRS resource set.

Optionally, the above method for determining the time domain interval for the aperiodic SRS may also be used for a semi-persistent SRS.

Semi-persistent SRS means that the SRS can be activated by DCI or MAC CE triggering, and the SRS can be deactivated by DCI or MAC CE triggering. Alternatively, the SRS can be activated by DCI or MAC CE triggering and activated after a period of time. This period of time can be specified by the protocol (no base station configuration, local pre-storage or pre-configuration) or can be configured by the base station. Alternatively, it may be activated after receiving the configuration information for a period of time, triggered by DCI or MAC CE, or activated after a period of time, and the time between receiving the configuration information and the activation may be specified by the protocol (no base station is required) Configuration, local pre-storage or pre-configuration) or through base station configuration, the period between activation and deactivation can also be specified by the protocol (no base station configuration, local pre-storage or pre-configuration) or can be configured by the base station.

Similar to the method of determining the time domain interval by the aperiodic SRS, the base station configures or pre-defines the first time interval and/or the second time interval. The first time interval is a minimum value of a time interval or a time interval of a PDSCH where the DCI of the semi-persistent SRS resource is activated, or a PDSCH where the MAC CE is located, and the semi-persistent SRS resource, for example, the terminal device may be after the time interval. The first transmission opportunity of the semi-persistent SRS starts transmission, and the transmission opportunity is determined according to time domain configuration information of the semi-persistent SRS. The second time interval is a time interval of the PDCCH where the DCI of the semi-persistent SRS resource is located, or the PDSCH where the CORESET or the MAC CE is located, and the time interval for stopping the transmission of the semi-persistent SRS resource or the last transmission of the SRS resource, for example, the terminal device may be at The transmission of the semi-persistent SRS is stopped after the time interval.

Optionally, the configuration method of the specific time interval is the same as that of the non-periodic SRS resource.

Optionally, the DCI or MAC CE may be used to activate or deactivate the at least one semi-persistent SRS resource, or may be used to activate or deactivate the at least one semi-persistent SRS resource set. When used to activate or deactivate a semi-persistent SRS resource set, the DCI or MAC CE includes an identifier for indicating semi-persistent SRS resource set identification information or for indicating an SRS resource set, and the semi-persistent SRS resource set is in all half The SRS resource set or the identifier in all SRS resource sets is persisted or supported by the form of a bitmap. Each bit in the bitmap corresponds to a semi-persistent SRS resource set, and the length of the bitmap is not less than the configured number of semi-persistent SRS resource sets, or equal to the number or maximum number of semi-persistent SRS resource sets.

Optionally, some of the rows or partial columns in the table in the foregoing solution may be used separately, or at least a part of the rows or at least a part of the columns may be used as part of the complete configuration table, which is not limited herein.

The symbol-level time domain parameters of SRS resources are described below.

In the embodiment of the present application, the time domain parameters of the symbol level of the SRS resource mainly include the following:

(1) The start symbol of the SRS resource in one slot.

Since the SRS is generally configured on the last M symbols in one slot, the start symbol of the SRS resource in one slot is located on the last M symbols in one slot. For example, the start symbol of the SRS resource in one slot is located on the last 6 symbols of the slot, and the position of the start symbol of the SRS resource in this slot is the last 6 symbols.

(2) The number of symbols of the SRS resource.

The number of symbols of the SRS resource, that is, the number of symbols occupied by the SRS resource in one time slot (hereinafter referred to as

),

Is a positive integer.

(3) The repetition factor of SRS resources.

In the embodiment of the present application, the repetition factor of the SRS resource refers to that the SRS resource is mapped to the same subcarrier in one slot and is mapped to the number of consecutive at least one symbol N, N≥1 and is an integer.

For the sake of simplicity in description, the repetition factor of the SRS resource is denoted as Lr below. That is, Lr=N.

In the embodiment of the present application, the repetition factor may also be referred to as a repetition length.

Referring to FIG. 3, FIG. 3 is a schematic diagram of the repetition length of SRS resources. In FIG. 3, the number of symbols of the SRS resource is equal to 4 as an example. As shown in (A) of FIG. 3, the repetition length of the SRS resource is equal to one. As shown in (B) of FIG. 3, the repetition length of the SRS resource is equal to two. As shown in (C) of FIG. 3, the repetition length of the SRS resource is equal to four.

It can be understood that the foregoing SRS resource satisfies some constraint relationship between the start symbol in one slot, the symbol number of the SRS resource, and the repetition length of the SRS resource. For example, the start symbol of the SRS resource in one slot determines the maximum number of symbols of the SRS resource. For example, if the starting position of the SRS resource in one slot is the last symbol in the slot, the number of symbols of the SRS resource can only be equal to 1. For another example, the number of symbols of the SRS resource determines the repetition length of the SRS resource. In other words, the repetition length of the SRS resource does not exceed the number of symbols of the SRS resource.

If the number of symbols included in one slot is denoted by N, and the index of the symbols in the slot is 0 to N-1. N is a positive integer. Then these constraint relationships can be expressed as:

(1) The maximum value of the start symbol of the SRS is not greater than N-M.

(2) The sum of the number of symbols of the SRS resource and the start symbol of the SRS resource is not greater than N-1.

Alternatively, the number of symbols of the SRS resource may be equal to 1, 2 or 4.

Alternatively, the repetition factor of the SRS resource may be equal to 1, 2 or 4.

Further, in consideration of these constraint relationships, the present application proposes jointly coding the time domain parameters of the above three symbol levels of the SRS resource to reduce resource overhead.

It can be understood that the start symbol of the SRS resource, the number of symbols of the SRS resource, and the repetition factor of the SRS resource may be jointly encoded by the network device and sent to the terminal device through one signaling. For example, the signaling may be the first configuration information in the embodiment of the present application. Table 7 of the joint encoding is given below with M=6 as an example.

Table 7

As an alternative, the repetition length of SRS resources can also be configured separately, see Table 8 below.

Table 8

In addition, the repetition length of the SRS resource is configured as shown in Table 9.

Table 9

SRS资源的重复长度配置Repeat length configuration of SRS resources	SRS资源的重复长度LrSRS resource repetition length Lr
0000	11
0101	22
1010	44
1111	reservedReserved

220. The terminal device determines, according to the time domain configuration information of the SRS resource, that the SRS resource is mapped in the first time unit by less than one first frequency domain location.

For a non-periodic SRS resource, the time domain configuration information of the SRS resource can be carried by Downlink Control Information (DCI).

If the time slot in which the terminal device receives the downlink control information is the time slot n, the terminal device may send the SRS to the network device in the time slot n+k. Where k is the time domain offset of the SRS resource, and n and k are positive integers.

If the symbol for transmitting the SRS configured in the time slot n+k cannot transmit the SRS, for example, the SRS resource is configured on the same symbol as the PUCCH or the PUSCH, or the Slot format indicator (SFI) SRS resource is the downlink. The resource or the unknown resource, the terminal device transmits the SRS on the symbol of the same position of the slot n+k+1. Referring to FIG. 4, FIG. 4 is a schematic diagram of the terminal device pushing and transmitting the SRS.

Further, if the symbol for transmitting the SRS configured on the slot n+k+1 continues to be unable to transmit the SRS, the terminal device transmits the SRS on the slot n+k+2, and so on.

However, in order to prevent the SRS from being transmitted multiple times, the network device may pre-configure the maximum time domain frequency domain quantity t (t>0 and an integer) of the SRS. That is, if the DCI triggered by the DCI on the slot n is not transmitted in the slot after the slot n+t.

The time domain offset t may be configured by higher layer signaling and/or DCI of the network device. Alternatively, t can also be predefined.

The following describes a process in which the terminal device determines, according to the first configuration information, at least one first frequency domain resource that the SRS resource maps in the first time unit.

For ease of understanding, we will describe one time unit as a time slot as an example.

Specifically, the terminal device determines, according to the first configuration information of the SRS resource and the current time slot, the count n _{SRS of the SRS} , and determines the frequency domain resource that the SRS resource maps in the current time slot according to the n _SRS. The frequency domain resource, the bandwidth of the first frequency domain resource is the SRS bandwidth, configured by B _SRS ).

The following describes the SRS resources and the aperiodic SRS resources for the period (including semi-persistence).

1. Periodic or semi-continuous SRS resources.

For periodic or semi-persistent SRS resources, n _SRS represents a count of locations within a radio frame period that are available for SRS to transmit on consecutive subcarriers of consecutive symbols. The n _SRS may be determined according to the following parameters: a system frame number, a slot number, a symbol number (that is, an index of a symbol), a start symbol of an SRS resource, a symbol number of an SRS resource, and a repetition factor of an SRS resource.

Specifically, n _SRS can be calculated and determined according to the following formula (1):

Among them, the physical meaning of the parameters in formula (1) is as follows:

Indicates the number of symbols of the SRS resource; n represents the system frame number;

Indicates the slot number; n _s represents the slot number in the frame; T _SRS represents the period of the SRS resource; n _symbol represents the _{symbol in the} slot;

Indicates the start symbol of the SRS resource in one slot (hereinafter referred to as the start symbol of the SRS resource); Lr represents the repetition factor of the SRS resource. symbol

Indicates rounding down.

among them

The number of symbols indicating that the symbol in the slot is different from the start symbol of the SRS resource may be used as a single variable or may be obtained by other expressions, for example, according to the symbol number in the subframe or in the frame, and the SRS resource. The start symbol, the subframe number, and the like.

among them

The sequence number indicating the current time slot in one frame period in all time slots available for transmitting the SRS may also be calculated by other equivalent expressions.

The sum of the numbers of symbols that can be sent by the user to the SRS in one frame period up to the current time slot can also be calculated by other equivalent expressions.

Alternatively, the formula n _SRS (1) may be calculated in one case, we do not rule out other cases n _SRS is calculated according to the other formulas.

2. Aperiodic SRS resources.

(1) If the non-periodic SRS resources only support frequency hopping within the time slot.

In this case, n _SRS represents the count of the location of the currently triggered SRS resource transmitted on the same subcarrier of consecutive symbols. The n _SRS can be determined according to the following parameters: the start symbol of the SRS resource in one slot, the symbol number, and the repetition factor of the SRS resource (referred to as L _r ).

Specifically, the n _SRS can be calculated and determined according to the following formula (2):

Optionally, the number of symbols transmitted by the SRS is a minimum of the number of symbols of the SRS resource, the product of the total hop count and the repetition factor. Therefore, when the number of symbols of the SRS resource

When the product of the total hop count and the repetition factor is K·N, only the symbols of the SRS resource are transmitted several times.

The SRS, that is, does not complete the transmission of all hops. Or when the number of symbols of the SRS resource

When the product K·N is greater than the total hop count and the repetition factor, the SRS transmission is performed only on the K·N symbols of the SRS resource, and the remaining symbols in the SRS resource are not transmitted in the SRS. Optionally, it may be used for transmission of other uplink channels (for example, PUSCH), or not for transmission, or for transmission of other SRSs.

among them

The number of symbols indicating the difference between the symbol in the slot and the start symbol of the SRS may be used as a single variable or may be obtained by other expressions. For example, it is determined according to a symbol number within a subframe or within a frame, a start symbol of an SRS, a subframe number, and the like. The time slot referred to herein is determined according to the time interval introduced in the foregoing step 210 and the resource in which the PDCCH or CORESET carrying the DCI for triggering the SRS transmission is located.

For example, express this constraint as the following formula (3):

Alternatively, you can express this constraint as the following formula (4):

(2) If the non-periodic SRS resource supports intra-slot hopping and inter-slot hopping.

In this case, n _SRS represents the count of the location of the currently triggered SRS resource transmitted on the same subcarrier of consecutive symbols. The n _SRS may be determined according to the following parameters: a start symbol of the SRS resource, a symbol number of the SRS resource, a repetition factor of the SRS resource, a symbol number, a time difference between the trigger DCI and the current time slot, and a time domain offset. The time domain offset referred to herein is also the time interval in step 210 above.

Specifically, n _SRS can be calculated and determined according to the following formula (5):

Here, the maximum value of n _SRS is the total hop count.

among them

The number of symbols indicating the difference between the symbol in the slot and the start symbol of the SRS may be used as a single variable or may be obtained by other expressions. For example, it is determined according to a symbol number within a subframe or within a frame, a start symbol of an SRS, a subframe number, and the like.

To trigger the time difference between the DCI and the current time slot.

The time slot difference indicating the first transmission of the aperiodic SRS to the current time slot can be calculated by other equivalent methods.

The number of symbols that can be used to transmit the aperiodic SRS before the first transmission of the aperiodic SRS to the current time slot may also be calculated by other equivalent expressions.

After the terminal device determines the n _SRS , it may determine, according to the n _SRS , at least one frequency domain resource (referred to as a first frequency domain resource in the present application) that the SRS resource maps in the current time slot.

230. The terminal device sends the SRS to the network device in the determined at least one first frequency domain resource.

In step 220, after the terminal device determines the at least one first frequency domain resource that the SRS resource maps in the current time slot, in step 230, the terminal device sends the SRS to the network device in the at least one first frequency domain resource.

A person skilled in the art should understand that the process in which the terminal device sends the SRS to the network device through the at least one first frequency domain resource is a process of frequency hopping.

In the embodiment of the present application, the network device can support multiple frequency hopping modes by configuring a repetition factor of the SRS resource. For example, the network device can support frequency hopping between time slots, time slots, and frequency hopping on each symbol in the time slot. Frequency hopping between every two symbols in time slots and time slots, frequency hopping of non-periodic SRS, etc., can improve the flexibility of frequency hopping.

In the above method 200, the terminal device sends the SRS to the network device in the determined at least one first frequency domain resource.

Optionally, the terminal device may send the SRS on each of the at least one first frequency domain resource. Or, in order to reduce the measurement time of the total bandwidth to be measured, the present application further provides the following frequency hopping manners, so that the terminal device can send the SRS in a part of the resource block (RB) of the at least one first frequency domain resource.

Mode 1

The terminal device determines, according to the first configuration information and the second configuration information, at least one second frequency domain resource that is mapped by the SRS resource in the first time unit, where the second frequency domain resource is part of the first frequency domain resource. The terminal device sends the SRS to the network device in the at least one second frequency domain resource.

In the mode 1, the network device configures the second configuration information in addition to the slot level time domain parameter and the symbol level time domain indicated by the first configuration information described above. The terminal device may determine at least one second frequency domain resource based on the at least one first frequency domain resource based on the first configuration information and the second configuration information. Wherein, a second frequency domain resource is part of a first frequency domain resource.

Optionally, the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter.

It should be noted that the SRS bandwidth location parameter is used to determine the bandwidth occupied by the second frequency domain resource. The SRS bandwidth location parameter is used to determine the location of the bandwidth occupied by the second frequency domain resource in the bandwidth occupied by the first frequency domain resource.

Hereinafter, the SRS bandwidth parameter is denoted as b _subband , and the SRS bandwidth position parameter is recorded as

It can be understood that the b _{subband is} actually configured with the bandwidth actually used by the terminal device when sending the SRS. The value of b _subband ranges from B _SRS ≤ b _subband ≤ 3, and the specific value of the bandwidth configured by b _subband can be obtained by querying the SRS bandwidth configuration table.

It is used to configure the location of the actual bandwidth in the SRS bandwidth when the terminal device sends the SRS.

The range of values is

If it is assumed that a user-level SRS bandwidth can contain at most the bandwidth corresponding to k b _subbands , then

The specific value should be

k is a positive integer.

An example of a configuration table suitable for the embodiment of the present application is given below. See Table 10.

Table 10

An example is given below in conjunction with FIG.

Referring to Figure 5, 5 is a schematic diagram of determining a second frequency domain resource.

In Figure 5, the user-level configuration parameters of the network device configuration are C _SRS = 24 and B _SRS =1. If the network device is configured with b _subband = 2,

The terminal device then transmits the SRS only on one subband of the user level SRS bandwidth. The subband of the user-level SRS bandwidth is the second frequency domain resource in the embodiment of the present application.

The number of resource blocks RB occupied by the second frequency domain resource in the frequency domain is expressed as m _{SRS, subband} , m _{SRS, and the subband} can be obtained by querying the SRS bandwidth configuration table.

It can be understood that, in FIG. 5, only the second frequency domain resource is used as an example. When the second frequency domain resource is at least two, the initial frequency domain location in the at least two second frequency domain resources may be based on Calculated by the following formula (6):

Alternatively, in mode 1, the relationship with b _subband and B _SRS may be interchanged. That is, the B _{SRS is} used to indicate the bandwidth size actually used by the terminal device when transmitting the SRS. b _{subband is} used to indicate user-level SRS bandwidth.

Mode 2

The terminal device determines, according to the first configuration information and the third configuration information, at least one third frequency domain resource that is mapped by the SRS resource in the first time unit, where the set of the at least one third frequency domain resource is the at least one first frequency A subset of the set of domain resources. The terminal device sends an SRS to the network device in the at least one third frequency domain resource.

In the mode 2, the network device configures the third configuration information in addition to the first configuration information described above. The terminal device may determine at least one third frequency domain resource based on the at least one first frequency domain resource based on the first configuration information and the third configuration information. The set of the at least one third frequency domain resource is a subset of the set of at least one first frequency domain resource in one or more time units.

In mode 2, the third configuration information may be used to indicate the number of reference symbols

In this application, the number of reference symbols

Determining at least one first frequency domain resource occupied by the SRS resource in a first time unit (eg, one time slot), where

And is an integer.

It should be noted that the number of reference symbols

The value range is greater than or equal to the number of symbols of the SRS resource.

Specifically, in mode 2, for periodic or semi-persistent SRS resources, the terminal device can calculate n _SRS according to the following formula (7):

Those skilled in the art can understand that the formula (7) is compared with the formula (1) above, and the parameters of the n _SRS are calculated.

Become

The rest are the same. due to

Is the number of symbols that the SRS resource can occupy in one time slot, because

The value is greater than

In the case of the value, the calculated value of n _SRS will also be different.

In other words, according to formula (7), calculated

Frequency hopping of symbols, but the terminal device is actually only

SRS is sent on the symbol. That is, there is

The SRS of the symbols is not sent. Therefore, the terminal device can implement transmitting the SRS only on part of the first frequency domain resources. The partial first frequency domain resource mentioned herein is at least one third frequency domain resource as referred to in the present application. That is, the set of the at least one third frequency domain resource is actually a subset of the set of the at least one first frequency domain resource.

An example is given below in conjunction with FIG.

Referring to FIG. 6, FIG. 6 is a schematic diagram of determining a third frequency domain resource. As shown in Figure 6, if the network device is configured

For SRS resources with a number of symbols equal to 4, there are 4 first frequency domain locations in one slot. At this time, the terminal device transmits the SRS on each of the first frequency domain resources. If the network device is configured

And the terminal device has

Symbol hopping for calculation, but only in practice

The SRS is transmitted on the symbols, and the terminal device can also implement the SRS transmission only on some of the RBs.

It should be understood that Mode 2 is not applicable for aperiodic SRS resources that only support frequency hopping within slots. Mode 2 is applicable for aperiodic SRS resources that support intra-slot hopping and inter-slot hopping. For example, the formula for calculating n _SRS can be as shown in equation (8):

In the embodiment of the present application, for the non-periodic SRS resource, if only the frequency hopping in the time slot is supported, when the total hop count K is greater than the symbol number of the SRS resource, if only the number of symbols of the SRS resource is exceeded,

Jumping before

It may not be evenly distributed in the total bandwidth to be measured, and therefore, the total bandwidth to be measured may be measured inaccurately.

It should be noted that, in the embodiment of the present application, the total hop count corresponding to the total bandwidth to be measured is recorded as K,

In other words, the total bandwidth to be measured includes K non-overlapping frequency resources, and the bandwidth of each of the K non-overlapping frequency resources is the SRS bandwidth.

The following is a description of the case where the total hop count is larger than the number of symbols of the SRS resource, and the total bandwidth measurement to be measured is not accurate.

Assume that the bandwidth configuration parameters in Table 11 are used.

Table 11

For example, if the network device is configured with b _hop =0, B _SRS = 3,

n _RRC =0, the 4 hops at which the terminal device measures the total bandwidth to be measured may be as shown in FIG. 7. Referring to FIG. 7, FIG. 7 is a schematic diagram of a terminal device transmitting an SRS. It can be seen from FIG. 7 that after the terminal device passes 4 hops, the hopping pattern is only distributed in the first 3/4 of the total bandwidth to be measured.

For another example, if the network device is configured with b _hop =0, B _SRS = 3,

n _RRC =0, the 2 hops at which the terminal device measures the total bandwidth to be measured may be as shown in FIG. Referring to FIG. 8, FIG. 8 is another schematic diagram of a terminal device transmitting an SRS. Similarly, after the terminal device has passed the measurement of 2 hops, the hopping pattern is only distributed over the first 1/2 of the total bandwidth to be measured.

In the case shown in FIG. 7 and FIG. 8 above, for the frequency band of the higher frequency not involved in the frequency hopping pattern, the measurement result of the channel can only be obtained by extrapolation, and thus the accuracy is low.

Therefore, for the problem that the SRS occurs in the non-periodic SRS resource transmission, the present application proposes some solutions to make the frequency hopping pattern cover the total bandwidth to be measured as uniformly as possible, thereby improving the accuracy of the measurement.

plan 1

The frequency interval between the first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured is not greater than the first threshold, and/or the at least one first The frequency interval between the second frequency domain location of the bandwidth occupied by the frequency domain resource and the second frequency domain location of the total bandwidth to be measured is not greater than the second threshold. The relationship that is satisfied between the at least one first frequency domain resource and the total bandwidth to be measured is hereinafter referred to as constraint 1.

Wherein, the first threshold value may be determined according to at least one of the following parameters: K, N,

The total bandwidth to be measured and the user-level SRS bandwidth, and/or the second threshold may also be determined according to at least one of the following parameters: K, N,

Total bandwidth to be measured and user-level SRS bandwidth.

It can be understood that, in the design idea in the scheme 1, the frequency interval between the first frequency domain position of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured should be made. The frequency bandwidth between the second frequency domain location of the bandwidth occupied by the bandwidth occupied by the at least one first frequency domain resource and the second frequency domain location of the total bandwidth to be measured is not greater than the second threshold.

In other words, the constraint 1 causes the at least one first frequency domain resource not to be distributed only in a part of the total bandwidth to be measured, but covers a larger bandwidth range as much as possible, so that the accuracy of the measurement can be improved.

Specifically, the following manner may be adopted to satisfy the constraint 1 described in the scheme 1 between the determined at least one first frequency domain resource and the total bandwidth to be measured.

Mode A

In mode A, we assume that the coverage measurement of the total bandwidth to be measured is completed, and a total of K frequency hopping is required.

This K-hop frequency hopping corresponds to the lowest level of the frequency hopping tree structure.

Nodes. Average the K nodes

Segment, each interval

Nodes, the i-th segment is located at the node

in

During the secondary frequency hopping process, the counter flag(i) and the frequency hopping counter NUM _{i are set} .

Initialize flag(i)=0, NUM _i =1.

For the Kth frequency hopping, calculate NUM _k as follows.

(1) Calculated according to formula (9)

Corresponding node (hereinafter referred to as node A) location

(2) Assume that node A is in the i-th segment, ie

If flag(i)=0, it is considered that the frequency hopping position is located at node A, and if step (3) goes to step (3), if flag(i)=1, then NUM _k-1 = NUM _k +1, returning to step (1) to recalculate frequency hopping position.

(3) Set flag(i) to 1, and end.

In addition, in the scheme 1, the start position of the sub-band transmitting the SRS is calculated according to the following formula (10):

The frequency hopping pattern determined according to the method of the scheme 1 is exemplified below.

It is first assumed that the bandwidth configuration shown in Table 12 is employed.

Table 12

If the network device is configured with b _hop =0, B _SRS = 3,

n _RRC =0, according to the method of the scheme 1, NUM ₀ =1, NUM ₁ =1, NUM ₂ =1, NUM ₃ = 3 can be calculated. The frequency hopping pattern is shown in FIG. 9. FIG. 9 is a frequency hopping pattern in a configuration of the present application.

If the network device is configured with b _hop =0, B _SRS = 3,

n _RRC =0, according to the method of scheme 1, NUM ₀ =1, NUM ₁ = 2 can be calculated. The frequency hopping pattern is shown in FIG. 10, and FIG. 10 is a frequency hopping pattern in another configuration of the present application.

As can be seen from Figure 9 and Figure 10, for

In terms of secondary frequency hopping, according to the method provided in the scheme 1, it is possible to ensure that the terminal device transmits the SRS.

The frequency domain locations are located at evenly spaced

Within the band. The frequency separation between the lowest frequency subcarrier of the frequency hopping bandwidth and the lowest subcarrier of the SRS resource is not greater than a threshold (ie, a first threshold). The frequency interval between the highest frequency subcarrier of the frequency hopping bandwidth and the highest frequency subcarrier of the SRS resource is not greater than a threshold (to be distinguished from the first threshold, which is referred to herein as the second threshold).

It can be understood that the first threshold value and the second threshold value may be equal or unequal. For example, the first threshold and the second threshold may both be equal to

That is, the frequency interval between the lowest frequency subcarrier of the total bandwidth to be measured and the lowest frequency subcarrier of the SRS resource is not greater than

User-level SRS bandwidth. Alternatively, the first threshold value and the second threshold value may also be set separately. The embodiment of the present application is not limited.

Scenario 2

The frequency interval between the third frequency domain locations of the adjacent two first frequency domain resources in the at least one first frequency domain resource is not greater than a third threshold, wherein the third threshold is based on at least one of the following parameters One OK: K,

Total bandwidth to be measured and user-level SRS bandwidth.

Here, the third frequency domain location may be the frequency domain location of the lowest or highest or the center frequency of the subcarriers occupied by the first frequency domain resource, or may be the highest of the bandwidth occupied by the first frequency domain resource. Or the frequency domain location of the lowest or center frequency subcarrier. Alternatively, it may be the position of the frequency domain of the subcarrier at any frequency between the lowest frequency and the highest frequency.

In scenario 2, we continue to assume that the coverage measurement of the total bandwidth to be measured is completed, and a total of K frequency hopping is required.

For aperiodic SRS resources, assume that a time slot needs to be performed.

Secondary frequency hopping. Corresponding design within this total bandwidth to be measured

SRS mapping subcarrier position fk,

The frequency interval between subcarriers of adjacent SRS resource mappings in the frequency domain is denoted by Δf _k , where

In an alternative, the frequency interval Δf _k is based on the number of hops in a time slot.

And the total number of hops K is determined and should be made

The frequency spacing Δf _{k is} not greater than the third threshold.

For example, the third threshold may be a user-level bandwidth B _SRS , ie |Δf _i -Δf _j | ≤ B _SRS .

Option 2 can guarantee

The frequency domain location of the secondary frequency hopping is evenly distributed in the total bandwidth to be measured, and the frequency interval between the third frequency domain locations of the two adjacent frequency domain resources of the SRS transmitted by the terminal device is substantially equal.

Alternatively, the starting subcarrier of the SRS resource mapping may be calculated according to the following formulas (11) to (13):

among them,

Alternatively, the starting subcarriers of the SRS resource mapping may also be calculated according to the following formulas (14) and (15):

It should be understood that the formula for calculating the frequency domain position of the subcarrier of the SRS resource mapping in the scheme 2 is not limited to the above formulas, and other forms of formulas may also be adopted.

The hopping pattern determined according to the scheme 2 will be exemplified below with reference to FIG. 11 and FIG.

It is first assumed that the bandwidth configuration shown in Table 13 is employed.

Table 13

For example, if the network device is configured with b _hop =0, B _SRS = 3,

n _RRC =0, if the calculation is performed using equations (11)-(13), the determined frequency hopping pattern is shown in Fig. 11. Figure 11 is an example of a frequency hopping pattern in a configuration. If the calculations are performed using equations (14) and (15), the determined frequency hopping pattern is shown in Fig. 12. Figure 12 is another example of a frequency hopping pattern in a configuration.

It can be seen from FIG. 11 and FIG. 12 that the frequency hopping pattern is determined according to the scheme provided in the scheme 2, and after four frequency hopping, the frequency domain position of the SRS transmitted by the terminal device is more evenly distributed throughout the bandwidth, so channel measurement can be improved. The accuracy.

n _RRC =0, if the calculation is performed using equations (11)-(13), the determined hopping pattern is shown in Fig. 13. Figure 13 is an example of a frequency hopping pattern in a configuration. If the calculations are performed using equations (14) and (15), the determined frequency hopping pattern is shown in Fig. 14. 14 is another example of a frequency hopping pattern in one configuration of the present application.

Mode 3

For the number of symbols equals

The SRS resource, the network device is configured as follows:

(1) The total number of hops K is not equal to

or

(2) The total hop count K is greater than

or

(3) The total hop count K is less than

In other words, the terminal device does not think that it will receive or assume that the network device does not receive the indication that K is not equal to

Instructions; or,

The terminal device does not consider that it will receive or assume that the network device does not receive the indication that K is greater than

Instructions; or,

The terminal device does not consider that it will receive or assume that it will not receive the network device to send the indication that K is less than

Instructions.

Based on the default configuration, if K is not equal

Or K is greater than

Or K is less than

Then, the terminal device does not send the SRS on the SRS resource configured in the current time slot.

It can be understood that, by mode 3, only a part of RBs that measure the total bandwidth to be measured can be implemented, so that the time for measuring the total bandwidth can be reduced.

Mode 4

The terminal device determines the hopping pattern according to the following formulas (16), (17), and (18), and implements transmitting the SRS on the partial RB.

In mode 4, in order to achieve uniform frequency hopping on part of the RB, the network device is configured with the parameter b _minhop . The default setting for b _minhop can be equal to B _SRS . That is to say, if the network device is configured with the value of b _minhop , the terminal device adopts the value of the b _minhop configuration. If the network device does not have the value _b minhop configuration, _b minhop take B _SRS. For example, the bandwidth of the fourth frequency domain resource may be determined according to the bandwidth set configured by the C _SRS . It can be seen from equation (17) that the b _hop +1 ～ b _minhop layer hopping only in the SRS tree bandwidth structure and not hopping on the b _minhop +1 ～ B _SRS layer. Thereby, the SRS can be transmitted only on a part of the RBs of the bandwidth occupied by each of the fourth frequency domain resources. The bandwidth corresponding to the partial RBs mentioned here is the bandwidth of the first frequency domain resource determined by the B _SRS .

The hopping pattern determined according to the method of the mode 4 will be exemplified below with reference to FIGS. 15 and 16.

Referring to FIG. 15, FIG. 15 is a frequency hopping pattern in a configuration using an embodiment of the present application. As shown in FIG. 15, C _SRS =24, b _minhop and B _SRS are both configured to be 2, and the bandwidth of the fourth frequency domain resource is the same as the bandwidth of the first frequency domain resource, so that the frequency hopping mode can be used for the measurement. SRS is sent on all RBs in the total bandwidth range.

Referring to FIG. 16, FIG. 16 is a frequency hopping pattern in another configuration using an embodiment of the present application. As shown in FIG. 16 , C _SRS =24, b _minhop is configured to be 1, and B _{SRS is} configured to be 2, and the bandwidth of the fourth frequency domain resource is greater than the bandwidth of the first frequency domain resource, for example, the fourth frequency domain in this embodiment. The bandwidth of the resource is twice the bandwidth of the first frequency domain resource, and then the fourth frequency domain resource of the two adjacent SRS transmissions is determined according to formula (17), that is, frequency hopping, but the SRS is actually transmitted in the fourth frequency domain resource. The relative position of the first frequency domain resource is unchanged, that is, no frequency hopping. Therefore, the SRS can be sent on a first frequency domain resource bandwidth in all the fourth frequency domain resources in the bandwidth to be measured by using frequency hopping, that is, the SRS is sent on some RBs in the bandwidth to be measured, and It is ensured that the RB partitions that transmit the SRS are equally distributed in the bandwidth to be measured.

Alternatively, the formulas (16) and (18) may have other different calculation methods or expression forms, which are not limited by the invention.

Optionally, the value range of b in the formula (17) is denoted as 0 to b _max , for example, b _max =B _SRS , and may be other values. Then the qualification of the formula (17) can be made as follows:

or,

Or further limiting the range of values of the b in a defined condition. Alternatively, other equivalent expressions may be used, and the invention is not limited.

Note that the symbols that appear in this article

With symbols

Indicates the same meaning.

The pre-definition can also be specified in the communication protocol.

The indication information or the configuration information in the embodiment of the present application may be transmitted through one signaling, or may be transmitted through multiple signaling. The signaling may be carried in RRC signaling, or in MAC CE signaling, or in DCI. The multiple signaling transmission may be indication information or configuration information divided into multiple parts, and each part is transmitted by one signaling. It may also be that one candidate set of information or configuration information is first configured by one signaling, and one of the candidate sets is indicated by another signaling. Alternatively, a candidate set of information or configuration information may be configured by one signaling, and then a subset of the candidate sets may be indicated by the second signaling, and then a third signaling may indicate a piece of information in the subset of candidate sets. . Optionally, the indication information or configuration information may also be configured by combining the foregoing various methods.

The method for transmitting a reference signal in the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 16. The terminal device and the network device in the embodiments of the present application are described below with reference to FIG. 17 to FIG.

FIG. 17 is a schematic block diagram of a terminal device 500 according to an embodiment of the present application. As shown in FIG. 17, the terminal device 500 includes a receiving unit 510, a processing unit 520, and a transmitting unit 530. among them,

The receiving unit 510 is configured to receive first configuration information of the sounding reference signal SRS resource from the network device, where the first configuration information includes a repetition factor of the SRS resource, where the repetition factor of the SRS resource is that the SRS resource is mapped to in one time unit The same subcarrier and mapped to the number of consecutive at least one symbol N, N ≥ 1 and an integer;

The processing unit 520 is configured to determine, according to the first configuration information, at least one first frequency domain resource that the SRS resource maps in the first time unit;

The sending unit 530 is configured to send, to the network device, an SRS in the at least one first frequency domain resource.

The respective units in the terminal device 500 of the embodiment of the present application and the other operations or functions described above are respectively used to implement the corresponding processes performed by the terminal device in the method for transmitting the reference signal, and details are not described herein again.

FIG. 18 is a schematic block diagram of a network device 600 according to an embodiment of the present application. As shown in FIG. 18, the network device 600 includes a transmitting unit 610 and a receiving unit 620. among them,

The sending unit 610 is configured to send first configuration information of the SRS resource to the terminal device, where the first configuration information includes a repetition factor of the SRS resource, where the repetition factor of the SRS resource refers to the SRS resource mapping to the same subcarrier in one time unit And mapping to the number of consecutive at least one symbol N, N ≥ 1 and being an integer;

The receiving unit 620 is configured to receive an SRS that is sent by the terminal device in the at least one first frequency domain resource, where the at least one first frequency domain resource is a frequency domain location of the sending SRS that is determined by the terminal device according to the first configuration information.

Each unit in the network device 600 of the embodiment of the present application and the other operations or functions described above are respectively configured to implement a corresponding flow performed by the network device in the method for transmitting the reference signal. For the sake of brevity, it will not be repeated here.

FIG. 19 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application. As shown in FIG. 19, the terminal device 700 includes one or more processors 701, one or more memories 702, and one or more transceivers 703. The processor 701 is configured to control the transceiver 703 to transmit and receive signals, the memory 702 is used to store a computer program, and the processor 701 is configured to call and run the computer program from the memory 702 such that the terminal device 700 performs a method of transmitting a reference signal. For the sake of brevity, it will not be repeated here.

FIG. 20 is a schematic structural diagram of a network device 800 according to an embodiment of the present application. As shown in FIG. 20, network device 800 includes one or more processors 801, one or more memories 802, and one or more transceivers 803. The processor 801 is configured to control the transceiver 803 to transmit and receive signals, the memory 802 is used to store a computer program, and the processor 801 is configured to call and run the computer program from the memory 802 such that the network device 800 performs a method of transmitting a reference signal. For the sake of brevity, it will not be repeated here.

In addition, the present application also provides a computer program product, comprising: computer program code, when the computer program code is run on a computer, causing a computer to execute the method for transmitting a reference signal to be executed by a terminal device Corresponding processes and / or operations.

Furthermore, the present application further provides a computer readable medium storing program code, when the computer program code is executed on a computer, causing a computer to execute the above-mentioned transmission reference signal, which is executed by the terminal device Corresponding processes and / or operations.

In addition, the present application also provides a chip system including a processor for a terminal device to implement the functions involved in the method of transmitting a reference signal. For example, data and/or information involved in the above methods are received or processed. In a possible design, the chip system further comprises a memory for storing necessary program instructions and data of the terminal device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In addition, the present application also provides a chip system including a processor for supporting a network device to implement the functions involved in the method of transmitting a reference signal. For example, data and/or information involved in the above methods are transmitted or processed. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the network device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In the above embodiments, the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the program of the present application. Execution of integrated circuits, etc. For example, the processor can include a digital signal processor device, a microprocessor device, an analog to digital converter, a digital to analog converter, and the like. The processor can distribute the control and signal processing functions of the mobile device among the devices according to their respective functions. Additionally, the processor can include functionality to operate one or more software programs, which can be stored in memory.

The functions of the processor may be implemented by hardware or by software executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

The memory can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of information and instructions that can be stored. Dynamic storage device. It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, and a disc storage (including a compact disc, a laser disc, a compact disc, a digital versatile disc, a Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other device that can be used to carry or store desired program code in the form of an instruction or data structure and accessible by a computer. Medium, but not limited to this.

Optionally, the foregoing memory and the memory may be physically independent units, or the memory may be integrated with the processor.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the technical solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

In view of the foregoing description, those skilled in the art will appreciate that the methods of the embodiments herein may be implemented by hardware (e.g., logic circuitry), or software, or a combination of hardware and software. Whether these methods are implemented in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

When the above functions are implemented in the form of software and sold or used as stand-alone products, they can be stored in a computer readable storage medium. In this case, the part of the technical solution of the present application, which contributes in essence or to the prior art, or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A method for transmitting a sounding reference signal SRS, comprising:

Receiving, by the network device, the first configuration information of the SRS resource, where the first configuration information includes a repetition factor of the SRS resource, where the repetition factor of the SRS resource is that the SRS resource is Mapping the number of consecutive at least one symbol on the same subcarrier and mapping N, N ≥ 1 and being an integer;

Determining, by the terminal device, the at least one first frequency domain resource that is mapped by the SRS resource in the first time unit according to the first configuration information;

The terminal device sends an SRS to the network device in the at least one first frequency domain resource.
The method according to claim 1, wherein the terminal device determines, according to the first configuration information, the at least one first frequency domain resource that the SRS resource maps in the first time unit, including:

Determining, by the terminal device, the at least one second frequency domain resource in the first time unit according to the first configuration information and the second configuration information, where the second frequency domain resource is the first Part of a frequency domain resource;

And sending, by the terminal device, the SRS to the network device in the at least one first frequency domain resource, including:

The terminal device sends the SRS to the network device in the at least one second frequency domain resource.
The method according to claim 2, wherein the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter, where the SRS bandwidth parameter is used to determine a bandwidth occupied by the second frequency domain resource. The SRS bandwidth location parameter is used to determine a location of a bandwidth occupied by the second frequency domain resource in a bandwidth occupied by the first frequency domain resource.
The method according to claim 1, wherein the first configuration information further comprises a number of symbols occupied by the SRS resource in one time unit.
Is a positive integer,

And determining, by the terminal device, the at least one first frequency domain resource that is mapped by the SRS resource in the first time unit according to the first configuration information, including:

Determining, by the terminal device, at least one third frequency domain resource that is mapped by the SRS resource in the first time unit, and the at least one third frequency domain resource component is configured according to the first configuration information and the third configuration information. a set of one or more subsets of the set of at least one first frequency domain resource within the time unit;

And sending, by the terminal device, the SRS to the network device in the at least one first frequency domain resource, including:

The terminal device sends the SRS to the network device in the at least one third frequency domain resource.
The method according to claim 4, wherein said third configuration information is used to indicate the number of reference symbols
The number of reference symbols is used to determine at least one first frequency domain resource occupied by the SRS resource in the first time unit, where
Greater than the above
And said
Is a positive integer.
The method according to claim 4, wherein the third configuration information is used to configure at least one fourth frequency domain resource, wherein a bandwidth of the fourth frequency domain resource is greater than a bandwidth of the first frequency domain resource, And the fourth frequency domain resource includes only one of the first frequency domain resources.
The method according to any one of claims 1 to 4, wherein the SRS resource is an aperiodic SRS resource, and the total bandwidth to be measured is composed of K non-overlapping SRS bandwidths.

And sending, by the terminal device, the SRS to the network device in the at least one first frequency domain resource, including:

If stated
Less than K·N, the terminal device sends the SRS only on each of the at least one first frequency domain resource in the first time unit; or

If stated
More than the K·N, the terminal device transmits the SRS only on the first K·N symbols of the SRS resource.
The method according to claim 6 or 7, wherein between the first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured The frequency interval is not greater than the first threshold, and/or between the second frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the second frequency domain location of the total bandwidth to be measured The frequency interval is not greater than the second threshold, wherein the first threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured and the user-level SRS bandwidth, and/or the second threshold are determined according to at least one of the following parameters: the K, the
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The method according to any one of claims 6 to 8, wherein a frequency interval between third frequency domain positions of two adjacent first frequency domain resources in the at least one first frequency domain resource Not greater than a third threshold, wherein the third threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The method according to any one of claims 1 to 9, wherein the start symbol of the SRS resource in one time unit and the number of symbols occupied by the SRS resource in one time unit
The repetition factor with the SRS resource is jointly encoded.
The method according to any one of claims 1 to 5, wherein the SRS resource is an aperiodic SRS resource, the method further comprising:

If the K is not equal to the stated
The terminal device does not send the SRS on the SRS resource in the first time unit; or

If the K is greater than the
The terminal device does not send the SRS on the SRS resource in the first time unit; or

If the K is smaller than the
And the terminal device does not send the SRS on the SRS resource in the first time unit.
A method for receiving a sounding reference signal SRS, comprising:

The network device sends the first configuration information of the SRS resource to the terminal device, where the first configuration information includes a repetition factor of the SRS resource, where the repetition factor of the SRS resource means that the SRS resource is used in one time unit Mapping the number of consecutive at least one symbol on the same subcarrier and mapping N, N ≥ 1 and being an integer;

Receiving, by the network device, the SRS that is sent by the terminal device in the at least one first frequency domain resource, where the at least one first frequency domain resource is sent by the terminal device according to the first configuration information. Frequency domain resources.
The method of claim 12, wherein the method further comprises:

The network device sends the second configuration information to the terminal device, so that the terminal device determines at least one second frequency domain resource according to the first configuration information and the second configuration information, where the second frequency domain The resource is part of the first frequency domain resource;

And the receiving, by the network device, the SRS sent by the terminal device in the at least one first frequency domain resource, including:

The network device receives the SRS sent by the terminal device in the at least one second frequency domain resource.
The method according to claim 13, wherein the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter, where the SRS bandwidth parameter is used to determine a bandwidth occupied by the second frequency domain resource. The SRS bandwidth location parameter is used to determine a location of a bandwidth corresponding to the second frequency domain resource in a bandwidth corresponding to the first frequency domain resource.
The method according to claim 12, wherein the first configuration information further comprises a number of symbols occupied by the SRS resource in one time unit
Is a positive integer,

And, the method further includes:

The network device sends third configuration information to the terminal device, so that the terminal device determines at least one third frequency domain resource according to the first configuration information and the third configuration information, the at least one third The frequency domain resource is a subset of the set of the at least one first frequency domain resource within one or more of the time units;

And the receiving, by the network device, the SRS sent by the terminal device in the at least one first frequency domain resource, including:

The network device receives the SRS sent by the terminal device in the at least one third frequency domain resource.
The method according to claim 15, wherein said third configuration information is used to indicate the number of reference symbols
The number of reference symbols is used to determine at least one first frequency domain resource occupied by the SRS resource in the first time unit, where
Greater than the above
Said
Is a positive integer.
The method according to claim 15, wherein the third configuration information is used to configure at least one fourth frequency domain resource, where a bandwidth of the fourth frequency domain resource is greater than a bandwidth of the first frequency domain resource, And the fourth frequency domain resource includes only one of the first frequency domain resources.
The method according to any one of claims 12 to 15, wherein the SRS resource is an aperiodic SRS resource, and the total bandwidth to be measured is composed of K non-overlapping SRS bandwidths.

And the receiving, by the network device, the SRS sent by the terminal device in the at least one first frequency domain resource, including:

If stated
If the network device is less than K·N, the network device receives, by the terminal device, the SRS on each of the at least one first frequency domain resource in the first time unit; or

If stated
If the network device is greater than the K·N, the network device receives the SRS sent by the terminal device on the first K·N symbols of the SRS resource in the first time unit.
The method according to claim 17 or 18, wherein between the first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured The frequency interval is not greater than the first threshold, and/or between the second frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the second frequency domain location of the total bandwidth to be measured The frequency interval is not greater than a second threshold value, and the first threshold value is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured and the user-level SRS bandwidth, and/or the second threshold are determined according to at least one of the following parameters: the K, the
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The method according to any one of claims 17 to 19, wherein a frequency interval between third frequency domain positions of two adjacent first frequency domain resources in the at least one first frequency domain resource Not greater than a third threshold, wherein the third threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The method according to any one of claims 12 to 20, wherein a start symbol of the SRS resource in one time unit and a number of symbols occupied by the SRS resource in one time unit
And the repetition factor of the SRS resource is jointly encoded and sent to the terminal device.
The method according to any one of claims 12 to 15, wherein the SRS resource is an aperiodic SRS resource, the method further comprising:

If the K is not equal to the stated
The network device does not receive the SRS on the SRS resource in the first time unit; or

If the K is greater than the
The network device does not receive the SRS on the SRS resource in the first time unit; or

If the K is smaller than the
The network device does not receive the SRS in the SRS resource in the first time unit.
An apparatus for transmitting a sounding signal SRS, comprising:

a receiving unit, configured to receive first configuration information of the SRS resource from the network device, where the first configuration information includes a repetition factor of the SRS resource, where the repetition factor of the SRS resource refers to the SRS resource at a time The number N, N ≥ 1 and an integer that are mapped in the same subcarrier and mapped in at least one consecutive symbol;

a processing unit, configured to determine, according to the first configuration information, at least one first frequency domain resource that is mapped by the SRS resource in a first time unit;

And a sending unit, configured to send, to the network device, an SRS in the at least one first frequency domain resource.
The apparatus according to claim 23, wherein the processing unit is further configured to determine, according to the first configuration information and the second configuration information, at least one of the SRS resources in the first time unit a second frequency domain resource, where the second frequency domain resource is part of the first frequency domain resource;

The sending unit is specifically configured to send the SRS to the network device in the at least one second frequency domain resource.
The apparatus according to claim 24, wherein the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter, where the SRS bandwidth parameter is used to determine a bandwidth occupied by the second frequency domain location The SRS bandwidth location parameter is used to determine a location of a bandwidth corresponding to the second frequency domain resource in a bandwidth corresponding to the first frequency domain resource.
The apparatus according to claim 23, wherein said first configuration information further comprises a number of symbols occupied by said SRS resource in one time unit
Is a positive integer,

And the processing unit is configured to determine, according to the first configuration information and the third configuration information, at least one third frequency domain resource that is mapped by the SRS resource in the first time unit, where the at least one The tri-frequency domain resource is a subset of the set of the at least one first frequency domain resource within one or more of the time units;

And the sending unit is specifically configured to send the SRS to the network device in the at least one third frequency domain resource.
The apparatus according to claim 26, wherein said third configuration information is for indicating the number of reference symbols
The number of reference symbols is used to determine at least one first frequency domain resource occupied by the SRS resource in the first time unit, where
Greater than the above
Said
Is a positive integer.
The apparatus according to claim 26, wherein the third configuration information is used to configure at least one fourth frequency domain resource, wherein a bandwidth of the fourth frequency domain resource is greater than a bandwidth of the first frequency domain resource, And the fourth frequency domain resource includes only one of the first frequency domain resources.
The apparatus according to any one of claims 23 to 26, wherein the SRS resource is an aperiodic SRS resource, and the total bandwidth to be measured is composed of K non-overlapping frequency resources, and the bandwidth of the frequency resource For the SRS bandwidth, and the sending unit is specifically used for:

If stated
Less than K·N, transmitting the SRS on each of the at least one first frequency domain resource in the first time unit; or

If stated
Greater than the K·N, the SRS is transmitted on the first K·N symbols of the SRS resource in the first time unit.
The apparatus according to claim 28 or 29, wherein between the first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured The frequency interval is not greater than the first threshold, and/or the frequency interval between the second frequency domain location of the at least one first frequency domain resource and the second frequency domain location of the total bandwidth to be measured is not Greater than a second threshold, wherein the first threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured and the user-level SRS bandwidth, and/or the second threshold are determined according to at least one of the following parameters: the K, the
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The apparatus according to any one of claims 28 to 30, wherein a frequency interval between third frequency domain positions of two adjacent first frequency domain resources in the at least one first frequency domain resource Not greater than a third threshold, wherein the third threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The apparatus according to any one of claims 23 to 31, wherein a start symbol of the SRS resource in one time unit and a number of symbols occupied by the SRS resource in one time unit
The repetition factor with the SRS resource is jointly encoded.
The device according to any one of claims 23 to 27, wherein the SRS resource is an aperiodic SRS resource, and the sending unit is further configured to:

If the K is not equal to the stated
Not transmitting the SRS on the SRS resource in the first time unit; or

If the K is greater than the
Not transmitting the SRS on the SRS resource in the first time unit; or

If the K is smaller than the
The SRS is not transmitted on the SRS resource in the first time unit.
An apparatus for receiving a sounding reference signal SRS, comprising:

a sending unit, configured to send first configuration information of the SRS resource to the terminal device, where the first configuration information includes a repetition factor of the SRS resource, where the repetition factor of the SRS resource refers to the SRS resource at a time The number N, N ≥ 1 and an integer that are mapped in the same subcarrier and mapped in at least one consecutive symbol;

a receiving unit, configured to receive an SRS that is sent by the terminal device in the at least one first frequency domain resource, where the at least one first frequency domain resource is a sent SRS that is determined by the terminal device according to the first configuration information. Frequency domain resources.
The device according to claim 34, wherein the sending unit is further configured to:

Sending, to the terminal device, second configuration information, so that the terminal device determines at least one second frequency domain resource according to the first configuration information and the second configuration information, where the second frequency domain resource is Part of the bandwidth of the first frequency domain resource;

And the receiving unit is specifically configured to receive the SRS that is sent by the terminal device in the at least one second frequency domain resource.
The apparatus according to claim 35, wherein the second configuration information is used to indicate an SRS bandwidth parameter and an SRS bandwidth location parameter, where the SRS bandwidth parameter is used to determine a bandwidth occupied by the second frequency domain resource. The SRS bandwidth location parameter is used to determine a location of a bandwidth corresponding to the second frequency domain resource in a bandwidth corresponding to the first frequency domain resource.
The apparatus according to claim 34, wherein said first configuration information further comprises a number of symbols occupied by said SRS resource in a time unit
Is a positive integer,

And the sending unit is further configured to send the third configuration information to the terminal device, so that the terminal device determines at least one third frequency domain resource according to the first configuration information and the third configuration information, where Said at least one third frequency domain resource is a subset of the set of said at least one first frequency domain resource within one or more of said time units;

And the receiving unit is specifically configured to receive the SRS that is sent by the terminal device in the at least one third frequency domain resource.
The apparatus according to claim 37, wherein said third configuration information is used to indicate the number of reference symbols
The number of reference symbols is used to determine at least one first frequency domain resource occupied by the SRS resource in the first time unit, where
Greater than the above
Said
Is a positive integer.
The apparatus according to claim 37, wherein the third configuration information is used to configure at least one fourth frequency domain resource, wherein a bandwidth of the fourth frequency domain resource is greater than a bandwidth of the first frequency domain resource, And the fourth frequency domain resource includes only one of the first frequency domain resources.
The apparatus according to any one of claims 34 to 38, wherein the SRS resource is an aperiodic SRS resource, and the total bandwidth to be measured is composed of K non-overlapping SRS bandwidths.

And, the receiving unit is configured to:

If stated
If the terminal device is less than K·N, the receiving terminal device sends the SRS on each of the at least one first frequency domain resource in the first time unit; or

If stated
And greater than the K·N, the receiving terminal device sends the SRS on the first K·N symbols of the SRS resource in the first time unit.
The apparatus according to claim 39 or 40, wherein between the first frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the first frequency domain location of the total bandwidth to be measured The frequency interval is not greater than the first threshold, and/or between the second frequency domain location of the bandwidth occupied by the at least one first frequency domain resource and the second frequency domain location of the total bandwidth to be measured The frequency interval is not greater than the second threshold, wherein the first threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured and the user-level SRS bandwidth, and/or the second threshold are determined according to at least one of the following parameters: the K, the
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The apparatus according to any one of claims 39 to 41, wherein a frequency interval between third frequency domain positions of two adjacent first frequency domain resources in the at least one first frequency domain resource Not greater than a third threshold, wherein the third threshold is determined according to at least one of the following parameters:
The N, the total bandwidth to be measured, and the user-level SRS bandwidth.
The apparatus according to any one of claims 34 to 42, wherein a start symbol of the SRS resource in one time unit and a number of symbols occupied by the SRS resource in one time unit
Coding with the repetition factor of the SRS resource.
The device according to any one of claims 34 to 38, wherein the SRS resource is an aperiodic SRS resource, and the receiving unit is further configured to:

If the K is not equal to the stated
Not receiving the SRS on the SRS resource in the first time unit; or

If the K is greater than the
Not receiving the SRS on the SRS resource in the first time unit; or

If the K is smaller than the
The SRS is not received on the SRS resource in the first time unit.